The effect of the river inhabiting fish on burst swimming performance in various flow.

为了确定马苏鲑和日本鲑在鱼道上游游动时的突发游泳速度，采用耐力隧道对养殖马苏鲑（Oncorhynchus masou masou）和日本鲑（Salvelinus leucomaenis）进行了野外游泳实验。在游泳实验期间使用高速摄像机进行测量。实验确定了这些鱼在上游高速游动时尾拍运动与游动速度的关系。利用河中冰虾虎鱼逆流而上的耐力隧道，对冰虾虎鱼的游泳速度进行了实验。这是日本首次测定冰虾虎鱼的游动曲线。

The authors conducted a field swimming experiment using cultured fingerling masu salmon (Oncorhynchus masou masou) and Japanese char (Salvelinus leucomaenis) employing a stamina tunnel in order to determine the burst swimming performance speed of masu salmon and Japanese char when swimming upstream in a fishway. Measurements were taken during the swimming experiment using a high-speed camera. The experiment determined the relationship between movement of tail beat and swimming speed when these fishes swim upstream at high speed. The authors also conducted an experiment on the swimming speed of ice goby (Leucopsarion petersi) using the stamina tunnel in the river in which the ice goby swam upstream. This experiment was the first time in Japan that the swimming curve of ice goby was determined.